package fun.ticsmyc.multiThread;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * 使用Lock.Condition实现 A -> B -> C -> A ->B ->C .....
 * @author Ticsmyc
 * @package fun.ticsmyc.multiThread
 * @date 2020-08-16 11:26
 */


class ShareResource{
    private int number = 1; //A:1  B:2  C:3
    private Lock lock  =new ReentrantLock();
    private Condition c1 = lock.newCondition();
    private Condition c2 = lock.newCondition();
    private Condition c3 = lock.newCondition();

    public void print5(){
        lock.lock();
        try{
            while(number !=1){
                c1.await();
            }
            for(int i=0;i<5;++i){
                System.out.println(Thread.currentThread().getName()+"\tAA"+"\t"+i);
            }
            number =2;
            c2.signal();
        }catch(Exception e){
            e.printStackTrace();
        }finally{
            lock.unlock();
        }
    }

    public void print10(){
        lock.lock();
        try{
            while(number !=2){
                c2.await();
            }
            for(int i=0;i<10;++i){
                System.out.println(Thread.currentThread().getName()+"\tBB"+"\t"+i);
            }
            number =3;
            c3.signal();
        }catch(Exception e){
            e.printStackTrace();
        }finally{
            lock.unlock();
        }
    }


    public void print15(){
        lock.lock();
        try{
            while(number !=3){
                c3.await();
            }
            for(int i=0;i<15;++i){
                System.out.println(Thread.currentThread().getName()+"\tCC"+"\t"+i);
            }
            number =1;
            c1.signal();
        }catch(Exception e){
            e.printStackTrace();
        }finally{
            lock.unlock();
        }
    }
}
public class 三个线程轮流调用 {

    public static void main(String[] args) {
        ShareResource shareResource=new ShareResource();

        new Thread(()->{
            for (int i = 0; i < 3; i++) {
                shareResource.print5();
            }
        }).start();
        new Thread(()->{
            for (int i = 0; i < 3; i++) {
                shareResource.print10();
            }

        }).start();
        new Thread(()->{
            for (int i = 0; i < 3; i++) {
                shareResource.print15();
            }

        }).start();
    }
}
